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netlink: Rename pid to portid to avoid confusion
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / net / xfrm.h
1 #ifndef _NET_XFRM_H
2 #define _NET_XFRM_H
3
4 #include <linux/compiler.h>
5 #include <linux/xfrm.h>
6 #include <linux/spinlock.h>
7 #include <linux/list.h>
8 #include <linux/skbuff.h>
9 #include <linux/socket.h>
10 #include <linux/pfkeyv2.h>
11 #include <linux/ipsec.h>
12 #include <linux/in6.h>
13 #include <linux/mutex.h>
14 #include <linux/audit.h>
15 #include <linux/slab.h>
16
17 #include <net/sock.h>
18 #include <net/dst.h>
19 #include <net/ip.h>
20 #include <net/route.h>
21 #include <net/ipv6.h>
22 #include <net/ip6_fib.h>
23 #include <net/flow.h>
24
25 #include <linux/interrupt.h>
26
27 #ifdef CONFIG_XFRM_STATISTICS
28 #include <net/snmp.h>
29 #endif
30
31 #define XFRM_PROTO_ESP 50
32 #define XFRM_PROTO_AH 51
33 #define XFRM_PROTO_COMP 108
34 #define XFRM_PROTO_IPIP 4
35 #define XFRM_PROTO_IPV6 41
36 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
37 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
38
39 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
40 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
41 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
42 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
43 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
44 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
45
46 #ifdef CONFIG_XFRM_STATISTICS
47 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
48 #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
49 #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
50 #else
51 #define XFRM_INC_STATS(net, field) ((void)(net))
52 #define XFRM_INC_STATS_BH(net, field) ((void)(net))
53 #define XFRM_INC_STATS_USER(net, field) ((void)(net))
54 #endif
55
56 extern struct mutex xfrm_cfg_mutex;
57
58 /* Organization of SPD aka "XFRM rules"
59 ------------------------------------
60
61 Basic objects:
62 - policy rule, struct xfrm_policy (=SPD entry)
63 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
64 - instance of a transformer, struct xfrm_state (=SA)
65 - template to clone xfrm_state, struct xfrm_tmpl
66
67 SPD is plain linear list of xfrm_policy rules, ordered by priority.
68 (To be compatible with existing pfkeyv2 implementations,
69 many rules with priority of 0x7fffffff are allowed to exist and
70 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71
72 Lookup is plain linear search until the first match with selector.
73
74 If "action" is "block", then we prohibit the flow, otherwise:
75 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
76 policy entry has list of up to XFRM_MAX_DEPTH transformations,
77 described by templates xfrm_tmpl. Each template is resolved
78 to a complete xfrm_state (see below) and we pack bundle of transformations
79 to a dst_entry returned to requestor.
80
81 dst -. xfrm .-> xfrm_state #1
82 |---. child .-> dst -. xfrm .-> xfrm_state #2
83 |---. child .-> dst -. xfrm .-> xfrm_state #3
84 |---. child .-> NULL
85
86 Bundles are cached at xrfm_policy struct (field ->bundles).
87
88
89 Resolution of xrfm_tmpl
90 -----------------------
91 Template contains:
92 1. ->mode Mode: transport or tunnel
93 2. ->id.proto Protocol: AH/ESP/IPCOMP
94 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
95 Q: allow to resolve security gateway?
96 4. ->id.spi If not zero, static SPI.
97 5. ->saddr Local tunnel endpoint, ignored for transport mode.
98 6. ->algos List of allowed algos. Plain bitmask now.
99 Q: ealgos, aalgos, calgos. What a mess...
100 7. ->share Sharing mode.
101 Q: how to implement private sharing mode? To add struct sock* to
102 flow id?
103
104 Having this template we search through SAD searching for entries
105 with appropriate mode/proto/algo, permitted by selector.
106 If no appropriate entry found, it is requested from key manager.
107
108 PROBLEMS:
109 Q: How to find all the bundles referring to a physical path for
110 PMTU discovery? Seems, dst should contain list of all parents...
111 and enter to infinite locking hierarchy disaster.
112 No! It is easier, we will not search for them, let them find us.
113 We add genid to each dst plus pointer to genid of raw IP route,
114 pmtu disc will update pmtu on raw IP route and increase its genid.
115 dst_check() will see this for top level and trigger resyncing
116 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
117 */
118
119 struct xfrm_state_walk {
120 struct list_head all;
121 u8 state;
122 union {
123 u8 dying;
124 u8 proto;
125 };
126 u32 seq;
127 };
128
129 /* Full description of state of transformer. */
130 struct xfrm_state {
131 #ifdef CONFIG_NET_NS
132 struct net *xs_net;
133 #endif
134 union {
135 struct hlist_node gclist;
136 struct hlist_node bydst;
137 };
138 struct hlist_node bysrc;
139 struct hlist_node byspi;
140
141 atomic_t refcnt;
142 spinlock_t lock;
143
144 struct xfrm_id id;
145 struct xfrm_selector sel;
146 struct xfrm_mark mark;
147 u32 tfcpad;
148
149 u32 genid;
150
151 /* Key manager bits */
152 struct xfrm_state_walk km;
153
154 /* Parameters of this state. */
155 struct {
156 u32 reqid;
157 u8 mode;
158 u8 replay_window;
159 u8 aalgo, ealgo, calgo;
160 u8 flags;
161 u16 family;
162 xfrm_address_t saddr;
163 int header_len;
164 int trailer_len;
165 } props;
166
167 struct xfrm_lifetime_cfg lft;
168
169 /* Data for transformer */
170 struct xfrm_algo_auth *aalg;
171 struct xfrm_algo *ealg;
172 struct xfrm_algo *calg;
173 struct xfrm_algo_aead *aead;
174
175 /* Data for encapsulator */
176 struct xfrm_encap_tmpl *encap;
177
178 /* Data for care-of address */
179 xfrm_address_t *coaddr;
180
181 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
182 struct xfrm_state *tunnel;
183
184 /* If a tunnel, number of users + 1 */
185 atomic_t tunnel_users;
186
187 /* State for replay detection */
188 struct xfrm_replay_state replay;
189 struct xfrm_replay_state_esn *replay_esn;
190
191 /* Replay detection state at the time we sent the last notification */
192 struct xfrm_replay_state preplay;
193 struct xfrm_replay_state_esn *preplay_esn;
194
195 /* The functions for replay detection. */
196 struct xfrm_replay *repl;
197
198 /* internal flag that only holds state for delayed aevent at the
199 * moment
200 */
201 u32 xflags;
202
203 /* Replay detection notification settings */
204 u32 replay_maxage;
205 u32 replay_maxdiff;
206
207 /* Replay detection notification timer */
208 struct timer_list rtimer;
209
210 /* Statistics */
211 struct xfrm_stats stats;
212
213 struct xfrm_lifetime_cur curlft;
214 struct tasklet_hrtimer mtimer;
215
216 /* used to fix curlft->add_time when changing date */
217 long saved_tmo;
218
219 /* Last used time */
220 unsigned long lastused;
221
222 /* Reference to data common to all the instances of this
223 * transformer. */
224 const struct xfrm_type *type;
225 struct xfrm_mode *inner_mode;
226 struct xfrm_mode *inner_mode_iaf;
227 struct xfrm_mode *outer_mode;
228
229 /* Security context */
230 struct xfrm_sec_ctx *security;
231
232 /* Private data of this transformer, format is opaque,
233 * interpreted by xfrm_type methods. */
234 void *data;
235 };
236
237 static inline struct net *xs_net(struct xfrm_state *x)
238 {
239 return read_pnet(&x->xs_net);
240 }
241
242 /* xflags - make enum if more show up */
243 #define XFRM_TIME_DEFER 1
244 #define XFRM_SOFT_EXPIRE 2
245
246 enum {
247 XFRM_STATE_VOID,
248 XFRM_STATE_ACQ,
249 XFRM_STATE_VALID,
250 XFRM_STATE_ERROR,
251 XFRM_STATE_EXPIRED,
252 XFRM_STATE_DEAD
253 };
254
255 /* callback structure passed from either netlink or pfkey */
256 struct km_event {
257 union {
258 u32 hard;
259 u32 proto;
260 u32 byid;
261 u32 aevent;
262 u32 type;
263 } data;
264
265 u32 seq;
266 u32 portid;
267 u32 event;
268 struct net *net;
269 };
270
271 struct xfrm_replay {
272 void (*advance)(struct xfrm_state *x, __be32 net_seq);
273 int (*check)(struct xfrm_state *x,
274 struct sk_buff *skb,
275 __be32 net_seq);
276 void (*notify)(struct xfrm_state *x, int event);
277 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
278 };
279
280 struct net_device;
281 struct xfrm_type;
282 struct xfrm_dst;
283 struct xfrm_policy_afinfo {
284 unsigned short family;
285 struct dst_ops *dst_ops;
286 void (*garbage_collect)(struct net *net);
287 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
288 const xfrm_address_t *saddr,
289 const xfrm_address_t *daddr);
290 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
291 void (*decode_session)(struct sk_buff *skb,
292 struct flowi *fl,
293 int reverse);
294 int (*get_tos)(const struct flowi *fl);
295 void (*init_dst)(struct net *net,
296 struct xfrm_dst *dst);
297 int (*init_path)(struct xfrm_dst *path,
298 struct dst_entry *dst,
299 int nfheader_len);
300 int (*fill_dst)(struct xfrm_dst *xdst,
301 struct net_device *dev,
302 const struct flowi *fl);
303 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
304 };
305
306 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
307 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
308 extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c);
309 extern void km_state_notify(struct xfrm_state *x, const struct km_event *c);
310
311 struct xfrm_tmpl;
312 extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
313 extern void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
314 extern int __xfrm_state_delete(struct xfrm_state *x);
315
316 struct xfrm_state_afinfo {
317 unsigned int family;
318 unsigned int proto;
319 __be16 eth_proto;
320 struct module *owner;
321 const struct xfrm_type *type_map[IPPROTO_MAX];
322 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
323 int (*init_flags)(struct xfrm_state *x);
324 void (*init_tempsel)(struct xfrm_selector *sel,
325 const struct flowi *fl);
326 void (*init_temprop)(struct xfrm_state *x,
327 const struct xfrm_tmpl *tmpl,
328 const xfrm_address_t *daddr,
329 const xfrm_address_t *saddr);
330 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
331 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
332 int (*output)(struct sk_buff *skb);
333 int (*output_finish)(struct sk_buff *skb);
334 int (*extract_input)(struct xfrm_state *x,
335 struct sk_buff *skb);
336 int (*extract_output)(struct xfrm_state *x,
337 struct sk_buff *skb);
338 int (*transport_finish)(struct sk_buff *skb,
339 int async);
340 };
341
342 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
343 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
344
345 extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
346
347 struct xfrm_type {
348 char *description;
349 struct module *owner;
350 u8 proto;
351 u8 flags;
352 #define XFRM_TYPE_NON_FRAGMENT 1
353 #define XFRM_TYPE_REPLAY_PROT 2
354 #define XFRM_TYPE_LOCAL_COADDR 4
355 #define XFRM_TYPE_REMOTE_COADDR 8
356
357 int (*init_state)(struct xfrm_state *x);
358 void (*destructor)(struct xfrm_state *);
359 int (*input)(struct xfrm_state *, struct sk_buff *skb);
360 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
361 int (*reject)(struct xfrm_state *, struct sk_buff *,
362 const struct flowi *);
363 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
364 /* Estimate maximal size of result of transformation of a dgram */
365 u32 (*get_mtu)(struct xfrm_state *, int size);
366 };
367
368 extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
369 extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
370
371 struct xfrm_mode {
372 /*
373 * Remove encapsulation header.
374 *
375 * The IP header will be moved over the top of the encapsulation
376 * header.
377 *
378 * On entry, the transport header shall point to where the IP header
379 * should be and the network header shall be set to where the IP
380 * header currently is. skb->data shall point to the start of the
381 * payload.
382 */
383 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
384
385 /*
386 * This is the actual input entry point.
387 *
388 * For transport mode and equivalent this would be identical to
389 * input2 (which does not need to be set). While tunnel mode
390 * and equivalent would set this to the tunnel encapsulation function
391 * xfrm4_prepare_input that would in turn call input2.
392 */
393 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
394
395 /*
396 * Add encapsulation header.
397 *
398 * On exit, the transport header will be set to the start of the
399 * encapsulation header to be filled in by x->type->output and
400 * the mac header will be set to the nextheader (protocol for
401 * IPv4) field of the extension header directly preceding the
402 * encapsulation header, or in its absence, that of the top IP
403 * header. The value of the network header will always point
404 * to the top IP header while skb->data will point to the payload.
405 */
406 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
407
408 /*
409 * This is the actual output entry point.
410 *
411 * For transport mode and equivalent this would be identical to
412 * output2 (which does not need to be set). While tunnel mode
413 * and equivalent would set this to a tunnel encapsulation function
414 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
415 * call output2.
416 */
417 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
418
419 struct xfrm_state_afinfo *afinfo;
420 struct module *owner;
421 unsigned int encap;
422 int flags;
423 };
424
425 /* Flags for xfrm_mode. */
426 enum {
427 XFRM_MODE_FLAG_TUNNEL = 1,
428 };
429
430 extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
431 extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
432
433 static inline int xfrm_af2proto(unsigned int family)
434 {
435 switch(family) {
436 case AF_INET:
437 return IPPROTO_IPIP;
438 case AF_INET6:
439 return IPPROTO_IPV6;
440 default:
441 return 0;
442 }
443 }
444
445 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
446 {
447 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
448 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
449 return x->inner_mode;
450 else
451 return x->inner_mode_iaf;
452 }
453
454 struct xfrm_tmpl {
455 /* id in template is interpreted as:
456 * daddr - destination of tunnel, may be zero for transport mode.
457 * spi - zero to acquire spi. Not zero if spi is static, then
458 * daddr must be fixed too.
459 * proto - AH/ESP/IPCOMP
460 */
461 struct xfrm_id id;
462
463 /* Source address of tunnel. Ignored, if it is not a tunnel. */
464 xfrm_address_t saddr;
465
466 unsigned short encap_family;
467
468 u32 reqid;
469
470 /* Mode: transport, tunnel etc. */
471 u8 mode;
472
473 /* Sharing mode: unique, this session only, this user only etc. */
474 u8 share;
475
476 /* May skip this transfomration if no SA is found */
477 u8 optional;
478
479 /* Skip aalgos/ealgos/calgos checks. */
480 u8 allalgs;
481
482 /* Bit mask of algos allowed for acquisition */
483 u32 aalgos;
484 u32 ealgos;
485 u32 calgos;
486 };
487
488 #define XFRM_MAX_DEPTH 6
489
490 struct xfrm_policy_walk_entry {
491 struct list_head all;
492 u8 dead;
493 };
494
495 struct xfrm_policy_walk {
496 struct xfrm_policy_walk_entry walk;
497 u8 type;
498 u32 seq;
499 };
500
501 struct xfrm_policy {
502 #ifdef CONFIG_NET_NS
503 struct net *xp_net;
504 #endif
505 struct hlist_node bydst;
506 struct hlist_node byidx;
507
508 /* This lock only affects elements except for entry. */
509 rwlock_t lock;
510 atomic_t refcnt;
511 struct timer_list timer;
512
513 struct flow_cache_object flo;
514 atomic_t genid;
515 u32 priority;
516 u32 index;
517 struct xfrm_mark mark;
518 struct xfrm_selector selector;
519 struct xfrm_lifetime_cfg lft;
520 struct xfrm_lifetime_cur curlft;
521 struct xfrm_policy_walk_entry walk;
522 u8 type;
523 u8 action;
524 u8 flags;
525 u8 xfrm_nr;
526 u16 family;
527 struct xfrm_sec_ctx *security;
528 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
529 };
530
531 static inline struct net *xp_net(const struct xfrm_policy *xp)
532 {
533 return read_pnet(&xp->xp_net);
534 }
535
536 struct xfrm_kmaddress {
537 xfrm_address_t local;
538 xfrm_address_t remote;
539 u32 reserved;
540 u16 family;
541 };
542
543 struct xfrm_migrate {
544 xfrm_address_t old_daddr;
545 xfrm_address_t old_saddr;
546 xfrm_address_t new_daddr;
547 xfrm_address_t new_saddr;
548 u8 proto;
549 u8 mode;
550 u16 reserved;
551 u32 reqid;
552 u16 old_family;
553 u16 new_family;
554 };
555
556 #define XFRM_KM_TIMEOUT 30
557 /* which seqno */
558 #define XFRM_REPLAY_SEQ 1
559 #define XFRM_REPLAY_OSEQ 2
560 #define XFRM_REPLAY_SEQ_MASK 3
561 /* what happened */
562 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
563 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
564
565 /* default aevent timeout in units of 100ms */
566 #define XFRM_AE_ETIME 10
567 /* Async Event timer multiplier */
568 #define XFRM_AE_ETH_M 10
569 /* default seq threshold size */
570 #define XFRM_AE_SEQT_SIZE 2
571
572 struct xfrm_mgr {
573 struct list_head list;
574 char *id;
575 int (*notify)(struct xfrm_state *x, const struct km_event *c);
576 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
577 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
578 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
579 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
580 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
581 int (*migrate)(const struct xfrm_selector *sel,
582 u8 dir, u8 type,
583 const struct xfrm_migrate *m,
584 int num_bundles,
585 const struct xfrm_kmaddress *k);
586 };
587
588 extern int xfrm_register_km(struct xfrm_mgr *km);
589 extern int xfrm_unregister_km(struct xfrm_mgr *km);
590
591 /*
592 * This structure is used for the duration where packets are being
593 * transformed by IPsec. As soon as the packet leaves IPsec the
594 * area beyond the generic IP part may be overwritten.
595 */
596 struct xfrm_skb_cb {
597 union {
598 struct inet_skb_parm h4;
599 struct inet6_skb_parm h6;
600 } header;
601
602 /* Sequence number for replay protection. */
603 union {
604 struct {
605 __u32 low;
606 __u32 hi;
607 } output;
608 struct {
609 __be32 low;
610 __be32 hi;
611 } input;
612 } seq;
613 };
614
615 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
616
617 /*
618 * This structure is used by the afinfo prepare_input/prepare_output functions
619 * to transmit header information to the mode input/output functions.
620 */
621 struct xfrm_mode_skb_cb {
622 union {
623 struct inet_skb_parm h4;
624 struct inet6_skb_parm h6;
625 } header;
626
627 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
628 __be16 id;
629 __be16 frag_off;
630
631 /* IP header length (excluding options or extension headers). */
632 u8 ihl;
633
634 /* TOS for IPv4, class for IPv6. */
635 u8 tos;
636
637 /* TTL for IPv4, hop limitfor IPv6. */
638 u8 ttl;
639
640 /* Protocol for IPv4, NH for IPv6. */
641 u8 protocol;
642
643 /* Option length for IPv4, zero for IPv6. */
644 u8 optlen;
645
646 /* Used by IPv6 only, zero for IPv4. */
647 u8 flow_lbl[3];
648 };
649
650 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
651
652 /*
653 * This structure is used by the input processing to locate the SPI and
654 * related information.
655 */
656 struct xfrm_spi_skb_cb {
657 union {
658 struct inet_skb_parm h4;
659 struct inet6_skb_parm h6;
660 } header;
661
662 unsigned int daddroff;
663 unsigned int family;
664 };
665
666 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
667
668 /* Audit Information */
669 struct xfrm_audit {
670 u32 secid;
671 uid_t loginuid;
672 u32 sessionid;
673 };
674
675 #ifdef CONFIG_AUDITSYSCALL
676 static inline struct audit_buffer *xfrm_audit_start(const char *op)
677 {
678 struct audit_buffer *audit_buf = NULL;
679
680 if (audit_enabled == 0)
681 return NULL;
682 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
683 AUDIT_MAC_IPSEC_EVENT);
684 if (audit_buf == NULL)
685 return NULL;
686 audit_log_format(audit_buf, "op=%s", op);
687 return audit_buf;
688 }
689
690 static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid,
691 struct audit_buffer *audit_buf)
692 {
693 char *secctx;
694 u32 secctx_len;
695
696 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
697 if (secid != 0 &&
698 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
699 audit_log_format(audit_buf, " subj=%s", secctx);
700 security_release_secctx(secctx, secctx_len);
701 } else
702 audit_log_task_context(audit_buf);
703 }
704
705 extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
706 u32 auid, u32 ses, u32 secid);
707 extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
708 u32 auid, u32 ses, u32 secid);
709 extern void xfrm_audit_state_add(struct xfrm_state *x, int result,
710 u32 auid, u32 ses, u32 secid);
711 extern void xfrm_audit_state_delete(struct xfrm_state *x, int result,
712 u32 auid, u32 ses, u32 secid);
713 extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
714 struct sk_buff *skb);
715 extern void xfrm_audit_state_replay(struct xfrm_state *x,
716 struct sk_buff *skb, __be32 net_seq);
717 extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
718 extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
719 __be32 net_spi, __be32 net_seq);
720 extern void xfrm_audit_state_icvfail(struct xfrm_state *x,
721 struct sk_buff *skb, u8 proto);
722 #else
723
724 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
725 u32 auid, u32 ses, u32 secid)
726 {
727 }
728
729 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
730 u32 auid, u32 ses, u32 secid)
731 {
732 }
733
734 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
735 u32 auid, u32 ses, u32 secid)
736 {
737 }
738
739 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
740 u32 auid, u32 ses, u32 secid)
741 {
742 }
743
744 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
745 struct sk_buff *skb)
746 {
747 }
748
749 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
750 struct sk_buff *skb, __be32 net_seq)
751 {
752 }
753
754 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
755 u16 family)
756 {
757 }
758
759 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
760 __be32 net_spi, __be32 net_seq)
761 {
762 }
763
764 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
765 struct sk_buff *skb, u8 proto)
766 {
767 }
768 #endif /* CONFIG_AUDITSYSCALL */
769
770 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
771 {
772 if (likely(policy != NULL))
773 atomic_inc(&policy->refcnt);
774 }
775
776 extern void xfrm_policy_destroy(struct xfrm_policy *policy);
777
778 static inline void xfrm_pol_put(struct xfrm_policy *policy)
779 {
780 if (atomic_dec_and_test(&policy->refcnt))
781 xfrm_policy_destroy(policy);
782 }
783
784 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
785 {
786 int i;
787 for (i = npols - 1; i >= 0; --i)
788 xfrm_pol_put(pols[i]);
789 }
790
791 extern void __xfrm_state_destroy(struct xfrm_state *);
792
793 static inline void __xfrm_state_put(struct xfrm_state *x)
794 {
795 atomic_dec(&x->refcnt);
796 }
797
798 static inline void xfrm_state_put(struct xfrm_state *x)
799 {
800 if (atomic_dec_and_test(&x->refcnt))
801 __xfrm_state_destroy(x);
802 }
803
804 static inline void xfrm_state_hold(struct xfrm_state *x)
805 {
806 atomic_inc(&x->refcnt);
807 }
808
809 static inline bool addr_match(const void *token1, const void *token2,
810 int prefixlen)
811 {
812 const __be32 *a1 = token1;
813 const __be32 *a2 = token2;
814 int pdw;
815 int pbi;
816
817 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
818 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
819
820 if (pdw)
821 if (memcmp(a1, a2, pdw << 2))
822 return false;
823
824 if (pbi) {
825 __be32 mask;
826
827 mask = htonl((0xffffffff) << (32 - pbi));
828
829 if ((a1[pdw] ^ a2[pdw]) & mask)
830 return false;
831 }
832
833 return true;
834 }
835
836 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
837 {
838 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
839 if (prefixlen == 0)
840 return true;
841 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
842 }
843
844 static __inline__
845 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
846 {
847 __be16 port;
848 switch(fl->flowi_proto) {
849 case IPPROTO_TCP:
850 case IPPROTO_UDP:
851 case IPPROTO_UDPLITE:
852 case IPPROTO_SCTP:
853 port = uli->ports.sport;
854 break;
855 case IPPROTO_ICMP:
856 case IPPROTO_ICMPV6:
857 port = htons(uli->icmpt.type);
858 break;
859 case IPPROTO_MH:
860 port = htons(uli->mht.type);
861 break;
862 case IPPROTO_GRE:
863 port = htons(ntohl(uli->gre_key) >> 16);
864 break;
865 default:
866 port = 0; /*XXX*/
867 }
868 return port;
869 }
870
871 static __inline__
872 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
873 {
874 __be16 port;
875 switch(fl->flowi_proto) {
876 case IPPROTO_TCP:
877 case IPPROTO_UDP:
878 case IPPROTO_UDPLITE:
879 case IPPROTO_SCTP:
880 port = uli->ports.dport;
881 break;
882 case IPPROTO_ICMP:
883 case IPPROTO_ICMPV6:
884 port = htons(uli->icmpt.code);
885 break;
886 case IPPROTO_GRE:
887 port = htons(ntohl(uli->gre_key) & 0xffff);
888 break;
889 default:
890 port = 0; /*XXX*/
891 }
892 return port;
893 }
894
895 extern bool xfrm_selector_match(const struct xfrm_selector *sel,
896 const struct flowi *fl,
897 unsigned short family);
898
899 #ifdef CONFIG_SECURITY_NETWORK_XFRM
900 /* If neither has a context --> match
901 * Otherwise, both must have a context and the sids, doi, alg must match
902 */
903 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
904 {
905 return ((!s1 && !s2) ||
906 (s1 && s2 &&
907 (s1->ctx_sid == s2->ctx_sid) &&
908 (s1->ctx_doi == s2->ctx_doi) &&
909 (s1->ctx_alg == s2->ctx_alg)));
910 }
911 #else
912 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
913 {
914 return true;
915 }
916 #endif
917
918 /* A struct encoding bundle of transformations to apply to some set of flow.
919 *
920 * dst->child points to the next element of bundle.
921 * dst->xfrm points to an instanse of transformer.
922 *
923 * Due to unfortunate limitations of current routing cache, which we
924 * have no time to fix, it mirrors struct rtable and bound to the same
925 * routing key, including saddr,daddr. However, we can have many of
926 * bundles differing by session id. All the bundles grow from a parent
927 * policy rule.
928 */
929 struct xfrm_dst {
930 union {
931 struct dst_entry dst;
932 struct rtable rt;
933 struct rt6_info rt6;
934 } u;
935 struct dst_entry *route;
936 struct flow_cache_object flo;
937 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
938 int num_pols, num_xfrms;
939 #ifdef CONFIG_XFRM_SUB_POLICY
940 struct flowi *origin;
941 struct xfrm_selector *partner;
942 #endif
943 u32 xfrm_genid;
944 u32 policy_genid;
945 u32 route_mtu_cached;
946 u32 child_mtu_cached;
947 u32 route_cookie;
948 u32 path_cookie;
949 };
950
951 #ifdef CONFIG_XFRM
952 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
953 {
954 xfrm_pols_put(xdst->pols, xdst->num_pols);
955 dst_release(xdst->route);
956 if (likely(xdst->u.dst.xfrm))
957 xfrm_state_put(xdst->u.dst.xfrm);
958 #ifdef CONFIG_XFRM_SUB_POLICY
959 kfree(xdst->origin);
960 xdst->origin = NULL;
961 kfree(xdst->partner);
962 xdst->partner = NULL;
963 #endif
964 }
965 #endif
966
967 extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
968
969 struct sec_path {
970 atomic_t refcnt;
971 int len;
972 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
973 };
974
975 static inline int secpath_exists(struct sk_buff *skb)
976 {
977 #ifdef CONFIG_XFRM
978 return skb->sp != NULL;
979 #else
980 return 0;
981 #endif
982 }
983
984 static inline struct sec_path *
985 secpath_get(struct sec_path *sp)
986 {
987 if (sp)
988 atomic_inc(&sp->refcnt);
989 return sp;
990 }
991
992 extern void __secpath_destroy(struct sec_path *sp);
993
994 static inline void
995 secpath_put(struct sec_path *sp)
996 {
997 if (sp && atomic_dec_and_test(&sp->refcnt))
998 __secpath_destroy(sp);
999 }
1000
1001 extern struct sec_path *secpath_dup(struct sec_path *src);
1002
1003 static inline void
1004 secpath_reset(struct sk_buff *skb)
1005 {
1006 #ifdef CONFIG_XFRM
1007 secpath_put(skb->sp);
1008 skb->sp = NULL;
1009 #endif
1010 }
1011
1012 static inline int
1013 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1014 {
1015 switch (family) {
1016 case AF_INET:
1017 return addr->a4 == 0;
1018 case AF_INET6:
1019 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1020 }
1021 return 0;
1022 }
1023
1024 static inline int
1025 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1026 {
1027 return (tmpl->saddr.a4 &&
1028 tmpl->saddr.a4 != x->props.saddr.a4);
1029 }
1030
1031 static inline int
1032 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1033 {
1034 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1035 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1036 }
1037
1038 static inline int
1039 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1040 {
1041 switch (family) {
1042 case AF_INET:
1043 return __xfrm4_state_addr_cmp(tmpl, x);
1044 case AF_INET6:
1045 return __xfrm6_state_addr_cmp(tmpl, x);
1046 }
1047 return !0;
1048 }
1049
1050 #ifdef CONFIG_XFRM
1051 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
1052
1053 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1054 struct sk_buff *skb,
1055 unsigned int family, int reverse)
1056 {
1057 struct net *net = dev_net(skb->dev);
1058 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1059
1060 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1061 return __xfrm_policy_check(sk, ndir, skb, family);
1062
1063 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1064 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1065 __xfrm_policy_check(sk, ndir, skb, family);
1066 }
1067
1068 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1069 {
1070 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1071 }
1072
1073 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1074 {
1075 return xfrm_policy_check(sk, dir, skb, AF_INET);
1076 }
1077
1078 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1079 {
1080 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1081 }
1082
1083 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1084 struct sk_buff *skb)
1085 {
1086 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1087 }
1088
1089 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1090 struct sk_buff *skb)
1091 {
1092 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1093 }
1094
1095 extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1096 unsigned int family, int reverse);
1097
1098 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1099 unsigned int family)
1100 {
1101 return __xfrm_decode_session(skb, fl, family, 0);
1102 }
1103
1104 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1105 struct flowi *fl,
1106 unsigned int family)
1107 {
1108 return __xfrm_decode_session(skb, fl, family, 1);
1109 }
1110
1111 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1112
1113 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1114 {
1115 struct net *net = dev_net(skb->dev);
1116
1117 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1118 (skb_dst(skb)->flags & DST_NOXFRM) ||
1119 __xfrm_route_forward(skb, family);
1120 }
1121
1122 static inline int xfrm4_route_forward(struct sk_buff *skb)
1123 {
1124 return xfrm_route_forward(skb, AF_INET);
1125 }
1126
1127 static inline int xfrm6_route_forward(struct sk_buff *skb)
1128 {
1129 return xfrm_route_forward(skb, AF_INET6);
1130 }
1131
1132 extern int __xfrm_sk_clone_policy(struct sock *sk);
1133
1134 static inline int xfrm_sk_clone_policy(struct sock *sk)
1135 {
1136 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1137 return __xfrm_sk_clone_policy(sk);
1138 return 0;
1139 }
1140
1141 extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1142
1143 static inline void xfrm_sk_free_policy(struct sock *sk)
1144 {
1145 if (unlikely(sk->sk_policy[0] != NULL)) {
1146 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1147 sk->sk_policy[0] = NULL;
1148 }
1149 if (unlikely(sk->sk_policy[1] != NULL)) {
1150 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1151 sk->sk_policy[1] = NULL;
1152 }
1153 }
1154
1155 #else
1156
1157 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1158 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1159 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1160 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1161 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1162 {
1163 return 1;
1164 }
1165 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1166 {
1167 return 1;
1168 }
1169 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1170 {
1171 return 1;
1172 }
1173 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1174 struct flowi *fl,
1175 unsigned int family)
1176 {
1177 return -ENOSYS;
1178 }
1179 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1180 struct sk_buff *skb)
1181 {
1182 return 1;
1183 }
1184 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1185 struct sk_buff *skb)
1186 {
1187 return 1;
1188 }
1189 #endif
1190
1191 static __inline__
1192 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1193 {
1194 switch (family){
1195 case AF_INET:
1196 return (xfrm_address_t *)&fl->u.ip4.daddr;
1197 case AF_INET6:
1198 return (xfrm_address_t *)&fl->u.ip6.daddr;
1199 }
1200 return NULL;
1201 }
1202
1203 static __inline__
1204 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1205 {
1206 switch (family){
1207 case AF_INET:
1208 return (xfrm_address_t *)&fl->u.ip4.saddr;
1209 case AF_INET6:
1210 return (xfrm_address_t *)&fl->u.ip6.saddr;
1211 }
1212 return NULL;
1213 }
1214
1215 static __inline__
1216 void xfrm_flowi_addr_get(const struct flowi *fl,
1217 xfrm_address_t *saddr, xfrm_address_t *daddr,
1218 unsigned short family)
1219 {
1220 switch(family) {
1221 case AF_INET:
1222 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1223 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1224 break;
1225 case AF_INET6:
1226 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1227 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
1228 break;
1229 }
1230 }
1231
1232 static __inline__ int
1233 __xfrm4_state_addr_check(const struct xfrm_state *x,
1234 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1235 {
1236 if (daddr->a4 == x->id.daddr.a4 &&
1237 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1238 return 1;
1239 return 0;
1240 }
1241
1242 static __inline__ int
1243 __xfrm6_state_addr_check(const struct xfrm_state *x,
1244 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1245 {
1246 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1247 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
1248 ipv6_addr_any((struct in6_addr *)saddr) ||
1249 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1250 return 1;
1251 return 0;
1252 }
1253
1254 static __inline__ int
1255 xfrm_state_addr_check(const struct xfrm_state *x,
1256 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1257 unsigned short family)
1258 {
1259 switch (family) {
1260 case AF_INET:
1261 return __xfrm4_state_addr_check(x, daddr, saddr);
1262 case AF_INET6:
1263 return __xfrm6_state_addr_check(x, daddr, saddr);
1264 }
1265 return 0;
1266 }
1267
1268 static __inline__ int
1269 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1270 unsigned short family)
1271 {
1272 switch (family) {
1273 case AF_INET:
1274 return __xfrm4_state_addr_check(x,
1275 (const xfrm_address_t *)&fl->u.ip4.daddr,
1276 (const xfrm_address_t *)&fl->u.ip4.saddr);
1277 case AF_INET6:
1278 return __xfrm6_state_addr_check(x,
1279 (const xfrm_address_t *)&fl->u.ip6.daddr,
1280 (const xfrm_address_t *)&fl->u.ip6.saddr);
1281 }
1282 return 0;
1283 }
1284
1285 static inline int xfrm_state_kern(const struct xfrm_state *x)
1286 {
1287 return atomic_read(&x->tunnel_users);
1288 }
1289
1290 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1291 {
1292 return (!userproto || proto == userproto ||
1293 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1294 proto == IPPROTO_ESP ||
1295 proto == IPPROTO_COMP)));
1296 }
1297
1298 /*
1299 * xfrm algorithm information
1300 */
1301 struct xfrm_algo_aead_info {
1302 u16 icv_truncbits;
1303 };
1304
1305 struct xfrm_algo_auth_info {
1306 u16 icv_truncbits;
1307 u16 icv_fullbits;
1308 };
1309
1310 struct xfrm_algo_encr_info {
1311 u16 blockbits;
1312 u16 defkeybits;
1313 };
1314
1315 struct xfrm_algo_comp_info {
1316 u16 threshold;
1317 };
1318
1319 struct xfrm_algo_desc {
1320 char *name;
1321 char *compat;
1322 u8 available:1;
1323 union {
1324 struct xfrm_algo_aead_info aead;
1325 struct xfrm_algo_auth_info auth;
1326 struct xfrm_algo_encr_info encr;
1327 struct xfrm_algo_comp_info comp;
1328 } uinfo;
1329 struct sadb_alg desc;
1330 };
1331
1332 /* XFRM tunnel handlers. */
1333 struct xfrm_tunnel {
1334 int (*handler)(struct sk_buff *skb);
1335 int (*err_handler)(struct sk_buff *skb, u32 info);
1336
1337 struct xfrm_tunnel __rcu *next;
1338 int priority;
1339 };
1340
1341 struct xfrm6_tunnel {
1342 int (*handler)(struct sk_buff *skb);
1343 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1344 u8 type, u8 code, int offset, __be32 info);
1345 struct xfrm6_tunnel __rcu *next;
1346 int priority;
1347 };
1348
1349 extern void xfrm_init(void);
1350 extern void xfrm4_init(int rt_hash_size);
1351 extern int xfrm_state_init(struct net *net);
1352 extern void xfrm_state_fini(struct net *net);
1353 extern void xfrm4_state_init(void);
1354 #ifdef CONFIG_XFRM
1355 extern int xfrm6_init(void);
1356 extern void xfrm6_fini(void);
1357 extern int xfrm6_state_init(void);
1358 extern void xfrm6_state_fini(void);
1359 #else
1360 static inline int xfrm6_init(void)
1361 {
1362 return 0;
1363 }
1364 static inline void xfrm6_fini(void)
1365 {
1366 ;
1367 }
1368 #endif
1369
1370 #ifdef CONFIG_XFRM_STATISTICS
1371 extern int xfrm_proc_init(struct net *net);
1372 extern void xfrm_proc_fini(struct net *net);
1373 #endif
1374
1375 extern int xfrm_sysctl_init(struct net *net);
1376 #ifdef CONFIG_SYSCTL
1377 extern void xfrm_sysctl_fini(struct net *net);
1378 #else
1379 static inline void xfrm_sysctl_fini(struct net *net)
1380 {
1381 }
1382 #endif
1383
1384 extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
1385 extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1386 int (*func)(struct xfrm_state *, int, void*), void *);
1387 extern void xfrm_state_walk_done(struct xfrm_state_walk *walk);
1388 extern struct xfrm_state *xfrm_state_alloc(struct net *net);
1389 extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1390 const xfrm_address_t *saddr,
1391 const struct flowi *fl,
1392 struct xfrm_tmpl *tmpl,
1393 struct xfrm_policy *pol, int *err,
1394 unsigned short family);
1395 extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1396 xfrm_address_t *daddr,
1397 xfrm_address_t *saddr,
1398 unsigned short family,
1399 u8 mode, u8 proto, u32 reqid);
1400 extern int xfrm_state_check_expire(struct xfrm_state *x);
1401 extern void xfrm_state_insert(struct xfrm_state *x);
1402 extern int xfrm_state_add(struct xfrm_state *x);
1403 extern int xfrm_state_update(struct xfrm_state *x);
1404 extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1405 const xfrm_address_t *daddr, __be32 spi,
1406 u8 proto, unsigned short family);
1407 extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1408 const xfrm_address_t *daddr,
1409 const xfrm_address_t *saddr,
1410 u8 proto,
1411 unsigned short family);
1412 #ifdef CONFIG_XFRM_SUB_POLICY
1413 extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1414 int n, unsigned short family);
1415 extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1416 int n, unsigned short family);
1417 #else
1418 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1419 int n, unsigned short family)
1420 {
1421 return -ENOSYS;
1422 }
1423
1424 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1425 int n, unsigned short family)
1426 {
1427 return -ENOSYS;
1428 }
1429 #endif
1430
1431 struct xfrmk_sadinfo {
1432 u32 sadhcnt; /* current hash bkts */
1433 u32 sadhmcnt; /* max allowed hash bkts */
1434 u32 sadcnt; /* current running count */
1435 };
1436
1437 struct xfrmk_spdinfo {
1438 u32 incnt;
1439 u32 outcnt;
1440 u32 fwdcnt;
1441 u32 inscnt;
1442 u32 outscnt;
1443 u32 fwdscnt;
1444 u32 spdhcnt;
1445 u32 spdhmcnt;
1446 };
1447
1448 extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark,
1449 u32 seq);
1450 extern int xfrm_state_delete(struct xfrm_state *x);
1451 extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
1452 extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1453 extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1454 extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1455 extern int xfrm_init_replay(struct xfrm_state *x);
1456 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1457 extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1458 extern int xfrm_init_state(struct xfrm_state *x);
1459 extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1460 extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
1461 int encap_type);
1462 extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1463 extern int xfrm_output_resume(struct sk_buff *skb, int err);
1464 extern int xfrm_output(struct sk_buff *skb);
1465 extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1466 extern int xfrm4_extract_header(struct sk_buff *skb);
1467 extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1468 extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1469 int encap_type);
1470 extern int xfrm4_transport_finish(struct sk_buff *skb, int async);
1471 extern int xfrm4_rcv(struct sk_buff *skb);
1472
1473 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1474 {
1475 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1476 }
1477
1478 extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1479 extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1480 extern int xfrm4_output(struct sk_buff *skb);
1481 extern int xfrm4_output_finish(struct sk_buff *skb);
1482 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1483 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1484 extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler);
1485 extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler);
1486 extern int xfrm6_extract_header(struct sk_buff *skb);
1487 extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1488 extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
1489 extern int xfrm6_transport_finish(struct sk_buff *skb, int async);
1490 extern int xfrm6_rcv(struct sk_buff *skb);
1491 extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1492 xfrm_address_t *saddr, u8 proto);
1493 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1494 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1495 extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1496 extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1497 extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1498 extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1499 extern int xfrm6_output(struct sk_buff *skb);
1500 extern int xfrm6_output_finish(struct sk_buff *skb);
1501 extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1502 u8 **prevhdr);
1503
1504 #ifdef CONFIG_XFRM
1505 extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1506 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
1507 #else
1508 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1509 {
1510 return -ENOPROTOOPT;
1511 }
1512
1513 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1514 {
1515 /* should not happen */
1516 kfree_skb(skb);
1517 return 0;
1518 }
1519 #endif
1520
1521 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1522
1523 extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1524 extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1525 int (*func)(struct xfrm_policy *, int, int, void*), void *);
1526 extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk);
1527 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1528 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1529 u8 type, int dir,
1530 struct xfrm_selector *sel,
1531 struct xfrm_sec_ctx *ctx, int delete,
1532 int *err);
1533 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err);
1534 int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
1535 u32 xfrm_get_acqseq(void);
1536 extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1537 struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark,
1538 u8 mode, u32 reqid, u8 proto,
1539 const xfrm_address_t *daddr,
1540 const xfrm_address_t *saddr, int create,
1541 unsigned short family);
1542 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1543
1544 #ifdef CONFIG_XFRM_MIGRATE
1545 extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1546 const struct xfrm_migrate *m, int num_bundles,
1547 const struct xfrm_kmaddress *k);
1548 extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
1549 extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1550 struct xfrm_migrate *m);
1551 extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1552 struct xfrm_migrate *m, int num_bundles,
1553 struct xfrm_kmaddress *k);
1554 #endif
1555
1556 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1557 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1558 extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
1559
1560 extern void xfrm_input_init(void);
1561 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1562
1563 extern void xfrm_probe_algs(void);
1564 extern int xfrm_count_auth_supported(void);
1565 extern int xfrm_count_enc_supported(void);
1566 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1567 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1568 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1569 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1570 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1571 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1572 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1573 extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1574 extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1575 int probe);
1576
1577 static inline int xfrm_addr_cmp(const xfrm_address_t *a,
1578 const xfrm_address_t *b,
1579 int family)
1580 {
1581 switch (family) {
1582 default:
1583 case AF_INET:
1584 return (__force u32)a->a4 - (__force u32)b->a4;
1585 case AF_INET6:
1586 return ipv6_addr_cmp((const struct in6_addr *)a,
1587 (const struct in6_addr *)b);
1588 }
1589 }
1590
1591 static inline int xfrm_policy_id2dir(u32 index)
1592 {
1593 return index & 7;
1594 }
1595
1596 #ifdef CONFIG_XFRM
1597 static inline int xfrm_aevent_is_on(struct net *net)
1598 {
1599 struct sock *nlsk;
1600 int ret = 0;
1601
1602 rcu_read_lock();
1603 nlsk = rcu_dereference(net->xfrm.nlsk);
1604 if (nlsk)
1605 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1606 rcu_read_unlock();
1607 return ret;
1608 }
1609 #endif
1610
1611 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1612 {
1613 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1614 }
1615
1616 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1617 {
1618 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1619 }
1620
1621 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1622 {
1623 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1624 }
1625
1626 #ifdef CONFIG_XFRM_MIGRATE
1627 static inline int xfrm_replay_clone(struct xfrm_state *x,
1628 struct xfrm_state *orig)
1629 {
1630 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1631 GFP_KERNEL);
1632 if (!x->replay_esn)
1633 return -ENOMEM;
1634
1635 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1636 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1637
1638 x->preplay_esn = kmemdup(x->replay_esn,
1639 xfrm_replay_state_esn_len(x->replay_esn),
1640 GFP_KERNEL);
1641 if (!x->preplay_esn) {
1642 kfree(x->replay_esn);
1643 return -ENOMEM;
1644 }
1645
1646 return 0;
1647 }
1648
1649 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1650 {
1651 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1652 }
1653
1654 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1655 {
1656 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1657 }
1658
1659 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1660 {
1661 int i;
1662 for (i = 0; i < n; i++)
1663 xfrm_state_put(*(states + i));
1664 }
1665
1666 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1667 {
1668 int i;
1669 for (i = 0; i < n; i++)
1670 xfrm_state_delete(*(states + i));
1671 }
1672 #endif
1673
1674 #ifdef CONFIG_XFRM
1675 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1676 {
1677 return skb->sp->xvec[skb->sp->len - 1];
1678 }
1679 #endif
1680
1681 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1682 {
1683 if (attrs[XFRMA_MARK])
1684 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1685 else
1686 m->v = m->m = 0;
1687
1688 return m->v & m->m;
1689 }
1690
1691 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1692 {
1693 int ret = 0;
1694
1695 if (m->m | m->v)
1696 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1697 return ret;
1698 }
1699
1700 #endif /* _NET_XFRM_H */
kernel source for telekom puls (alcatel/mediatek)